Package gw.util.perf.objectsize

Class ObjectSizeUtil

java.lang.Object

gw.util.perf.objectsize.ObjectSizeUtil

public class ObjectSizeUtil
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	ObjectSizeUtil.ObjectEntry

Field Summary

Fields

Modifier and Type	Field	Description
private static DecimalFormat	decimalFormat
private static final IObjectSizeFilter	DEFAULT_FILTER
private static final String	INDENT
private static final Map	primitiveSizes
static boolean	VERBOSE

Constructor Summary

Constructors

Constructor	Description
ObjectSizeUtil()

Method Summary

Modifier and Type	Method	Description
static ObjectSize	deepSizeOf(Object obj)
static ObjectSize	deepSizeOf(Object obj, IObjectSizeFilter filter, int maxObjects)	Calculates full size of object iterating over its hierarchy graph.
private static long	getArrayShallowSize(Object obj)
static int	getFieldSize(Class clazz)
static int	getPointerSize()
private static long	internalSizeOf(ObjectSizeUtil.ObjectEntry entry, Stack<ObjectSizeUtil.ObjectEntry> stack, Map<Object,Object> visited, IObjectSizeFilter filter, String indent)
static void	main(String[] args)
private static long	roundUpToNearestEightBytes(long result)
private static boolean	skipField(Field field, IObjectSizeFilter filter)
private static boolean	skipObject(Object obj, Map<Object,Object> visited, IObjectSizeFilter filter)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

VERBOSE

public static boolean VERBOSE

INDENT

private static final String INDENT

See Also:

• Constant Field Values

DEFAULT_FILTER

private static final IObjectSizeFilter DEFAULT_FILTER

decimalFormat

private static DecimalFormat decimalFormat

primitiveSizes

private static final Map primitiveSizes

Constructor Details

ObjectSizeUtil

public ObjectSizeUtil()

Method Details

getFieldSize

public static int getFieldSize(Class clazz)

getPointerSize

public static int getPointerSize()

deepSizeOf

public static ObjectSize deepSizeOf(Object obj,
 IObjectSizeFilter filter,
 int maxObjects)

Calculates full size of object iterating over its hierarchy graph.

Parameters:

obj - object to calculate size of

filter - the filter used to ignore fields or objects

maxObjects - the max numbers of objects to traverse

Returns:

object size

Throws:

Exception

deepSizeOf

public static ObjectSize deepSizeOf(Object obj)

skipObject

private static boolean skipObject(Object obj,
 Map<Object,Object> visited,
 IObjectSizeFilter filter)

skipField

private static boolean skipField(Field field,
 IObjectSizeFilter filter)

getArrayShallowSize

private static long getArrayShallowSize(Object obj)

internalSizeOf

private static long internalSizeOf(ObjectSizeUtil.ObjectEntry entry,
 Stack<ObjectSizeUtil.ObjectEntry> stack,
 Map<Object,Object> visited,
 IObjectSizeFilter filter,
 String indent)

roundUpToNearestEightBytes

private static long roundUpToNearestEightBytes(long result)

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception